Turning and drilling machine



(No Model.) 6 SheetsSheet 1. W. W. TUCKER.

TURNING AND DRILLING MACHINE. No. 578,431. Patented Mar, 9, 1897."

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(No Model 6 SheetsSheet 2. W. W. TUCKER. TURNING AND DRILLING MAGHINE.

Patented Mar. 9, 1897.

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6 Sheets-Sheet 3.

(No Model.)

' W. W. TUCKER.

TURNING AND DRILLING MACHINE.

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' (No Model.) 6 Sheets-Sheet 5.

W. W. TUCKER. TURNING AND DRILLING MACHINE.

No. 578,431. Patented Mar. 9,1897,

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(No Model.) 6 Sheets-Sheet 6.

W. W. TUCKER. .TURNING AND DRILLING MACHINE.

No. 578,431. 7 Patented Mar. 9, 1897.

Witnesses: [710676 tor;-

William W. Tucker.- .By his uftiorn y arms so. wo'rau HO. w To UNITEDSTATES AT NT OFFICE.

IVILLIAM IV. TUCKER, OF HARTFORD, CONNECTICUT.

TURNING AND DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 578,431, dated March 9,1897.

Application filed October 19, 1896. erial No- 609,346-. (No model.)

To all whom it may concern.

Be it known-that I, WILLIAM W. TUCKER, a citizen of the United States,residing in Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inTurning and Drilling Machines, of which the following is aspecification.

This inventionrelates to a combined turning and drilling machine, andmore especially to that class of machines employed in the manufacture ofbicycle-wheelhub blanks,the machine constituting the subject-matter ofthe present invention being somewhat in the nature of an improvementupon the machine described in Letters Patent of the United States No.527,907, granted to me October 23, 1894, to which reference may be had.

- One object of my present invention is to furnish an improved machineof the class specified embodying automatic means whereby hub-blanks orother articles may be turned down to an approximately-finished size andbored at one operation, to thereby decrease the cost of manufacture bymaterially reduc: ing the length of time necessary to complete theturning and drilling operations, which operations have heretofore beenaccomplished successively, the blank being first turned to the propersize and subsequently drilled, as described in the patent hereinreferred to.

A further object of the invention is to provide in operative relationwith the work-carrying spindle in a machine of the class specified andin position for engaging the piece being operated upon an improvedsteady-rest embodying instru mentalities for engaging the piece beingoperated upon and also embodying means for maintaining the rest inconstant contact with the piece during the turning operation, and toprovide means in con-' .ing oil automatically to those parts of themachine where it is necessary.

In the drawings accompanying and formtive rod or piece of stock and inthe position they occupy during the first stages in the turning-down anddrilling operations. Fig. 2 is a side elevation of the machine as seenfrom the under side in Fig. 1, a portion of the bed or framework of themachine being broken away. Fig. 3 is a relatively large cross-sectionalview of the machine, taken in dotted line a a, Fig. 2, and as seen fromthe left hand in said figure. This figure is more especially intendedtoillustrate the construction,organization, and operation of thesteadyrest, which is shown partially in section, and the elements whichautomatically control the feed movements of the cutter-slides, and forconvenience certain irrelative parts of the machine are omitted. Fig. 4is a similar cross-sectional view of the machine, taken in dotted line bb, Fig. 2, as seen from the left hand. This figure ismore especiallyintended to illustrate the construction, organization, and operationofthose elements which automatically control the feed movements of thedrilling mechanism, and for convenience certain parts of the machineinessential to this operation are omitted in this figure. Fig. 5

is a vertical longitudinal section, on a relatively large scale ascompared with Fig. 2, of a portion of the machine, taken in dotted line0 c, Fig. 1. Fig. 6 is a cross-sectional view of a portion of the bed ofthe machine and shows the preferred form of said steady-rest partiallyin section and in operative connection therewith and also shows onecutterslide, a cutter carried thereby, a cutting-0E tool also carried bysaid slide, and a steadyrest actuator in connection with said slide; andFig. 7 is a side view of the parts shown in Fig. 6 as seen from theright hand in said figure.

Similar characters designate like parts in all the figures of thedrawings.

In the preferred form thereof shown in the drawings myimproved combinedturning and drilling machine comprises in part a suitable framework, arotative rod or work-carrying Ice spindle, a rotative drill-carryingspindle, in-' dependent driving mechanism in operative connection withand effective for rotating the working spindle and drill-spindle inrelatively opposite directions at predetermined relative velocities, acutter-carrying slide sup ported for movement in a plane transverse tothe axial line of the work-spindle, feed mechanism operativelyconnecting the cutter-slide and drill-spindle and effective forsimultaneously advancing and retracting the cutterslide anddrill-spindle in relatively intersecting plan es, automatically-operablemeans for controlling the feed movements of the cutterslide anddrillspindle, and a steady-rest in operative relation with the axialline with the work-spindle and embodying automaticallyshiftable members.

Inasmuch as many of the parts of the machine constituting thesubject-matter of my present application are substantially the same inconstruction, organization, and operation as like parts designated bythe same characters in the patent hereinbefore referred to, a briefdescription of such parts is deemed sufficient herein, and for a moredetailed description of such parts reference may be had to the patenthereinbefore referred to.

The framework of the machine, which may be of any suitable constructionfor carrying the several operative details, is shown si1nilar in ageneral way to an ordinary latheframe, and it preferably consists of abed B, having the usual longitudinal slideways 2 and 8 for directing themovements of certain parts.

Located at one end of the bed (shown in Figs. 1 and 2 as the righthandend) is the head-stock or spindle-carrying head H, in which is supportedfor rotative movement a work or rod carrying spindle S, which in thepresent instance is shown of the same general'construction andorganization as that described in the patent referred to, and is drivenfrom an y suitable sou roe of power (not shown) through the medium ofthe spindle-driving mechanism, (designated in a general way by (1 )whichspindle-driving mechanism may be similar to that described in the patentreferred to or similar to the driving mechanism for the spindle of anordinary lathe.

The turning-down mechanism is shown in the drawings of substantially thesame general construction and organization as that described in thepatent referred to, and comprises two oppositely-disposed cutter-slides6 and '7, one of which is located at one side the longitudinal axis ofthe spindle and the other of which is located at the opposite side saidaxis, and they are supported in suitable slideways upon a slide-rest R,which in turn is supported upon the bed B of the machine, said slidesbeing adapted for simultaneous movement toward and from each other in aplane intersecting the plane of the longitudinal axis of thework-carrying spindle.

As a means for advancing and retracting the slides simultaneously I haveprovided a right and left hand I feed-screw F, which extends throughright and left hand screwthreaded bearings 9 and 10 (shown in dottedlines in Fig. on the under side of and central with relation to the twoslides 6 and '7, respectively, said screw being rotatably supported atits ends in bearings formed in the upper end of the slide-rest R andbeing provided with flanges 11 and 11 at the ends adjacent to the innerfaces of the end walls of the slide-rest, which flanges preventlongitudinal movement of said screws.

Mounted upon the inner ends of the cutterslides 6 and '7 are two cuttersC and C the cutting-faces of which are shown oppositely disposed, thesecutters having a cutting-face I of substantiallythe length of thehub-blank being turned, as will be hereinafter described.

Located on the bed 13 of the machine, at the end opposite to that uponwhich the headstock H is located, is a tail-stock T in a bearing, at theupper end of which is journaled a longitudinally-grooved shaft 100, saidshaft being furnished with pulleys p, by means of which the same may berotated from any suitable source of power.

Supported in suitable slideways below the shaft 100 on the bed of themachine, for movement in a plane longitudinally of the workspindle, is adrill-spindle carrier, (designated in a general way by D,) androtatively supported in suitable bearin gs on said carrier is adrill-carrying spindle, (designated in a general way by K,) in the innerend of which is chucked a drill 9 the axis of which is shown inalinement with the axis of the work-carrying spindle S.

As a means for rotating the drill-spind-le and for facilitating alongitudinal movement thereof during such rotation said drill-spin-.

dle is shown furnished at the outer end thereof with a spur-wheel 101,which meshes with a pinion 102, splined to the drill-spindle-actuating.shaft 100, which pinion is shown carried by a sleeve which is journaledin a bearing 102 and surrounds the shaft 100 on the drill-spindlecarrier D, said sleeve being flanged to prevent longitudinal movementthereof with relation to the bearing 102. This organization ofdrill-spindle-driving mechanism facilitates a movement of thedrill-spindle carrier and connected parts toward and away from thework-carryingspindle simultaneously with the rotation of thedrill-spindle K through the medium. of the shaft 100.

As a means for rotating the feed-screw F to bring the cutters C and Ccarried by the cutter-slides 6 and 7, to the work I have provided anautomatic feed mechanism which in the form thereof shown in the drawingsis similar, in a general way, to the same mechanism described in thepatent hereinbefore referred to, and which mechanism preferably consistsof a horizontally-disposed shaft 15, journaled in suitable bearings uponthe bed ICC of the machine at one side thereof, as shown most clearly inFigs. 2, 3, and 4, and carrying a pinion 16, (shown in dotted lines inFig. 1,) which meshes with a pinion 16 upon a shiftably-supportedworm-shaft 18, which in turn carries a worm 19 in mesh with a worm-wheel20, carried upon a stud 21, secured to the slide-rest R, which stud alsocarries a pinion 22, that meshes with a gearwheel 23, fixed to the outerend of the feedscrew F. This shaft 15 may be driven in any suitablemanner-as, for instance, through gearing or driving devices (1 (see Fig.2,) intermediate to and connecting said shaft 1.5 and thework-spindle-driving mechanism (1 The worm-shaft 18 is shown journaledat its end in bearings formed in outwardly-projecting arms of thebracket 18, which is supported for swinging movement upon the shaft 15,said bracket being furnished at one end thereof with a shifting lever25, (shown in full lines in Fig. 3,) the free end of which is furnishedwith ahandle 26, by means of which the same may be operated by hand.

During the operation of the machine the shifting lever 25 is locked inthe depressed position shown in Fig. 3 of the drawings with theworm-wheel 20, and as a means for holding the worm up to its workingposition in engagement with said worm-wheel a locking-lever 27 isprovided, which is herein shown pivoted midway of its length upon theslide-rest, with its lower end in normal engagement with a catch orlateral projection 28 upon the inner face of the shifting lever 25. Theupper opposite end of the lockinglever is located in the path ofmovement of a tripping device 29, carried upon one of the tool-carryingslides, said locking-lever 27 being normally held with its lower end inengagement with the catch upon the shifting lever 25 by means of aspring 30, connected at one end to said lever and at its opposite end tothe slide-rest, as shown most clearly in Figs. 3 and 4 of the drawings.

As a means for automatically throwing the shifting lever 25 intoposition to disengage the worm 19 from the worm-wheel 20 upon therelease of the locking-lever 27, I have provided a retracting-spring26,which is secured at one end to a pin 26 upon the shifting lever 25and at its opposite end to a convenient portion of the slide-rest R.

From the foregoing description of this mechanism, which maybeconsistently termed the automatic feed-controlling mechanism, it will beseen that the feed movement of the cutter-slides may be readily limited,and that when said slides have traversed this limited distance thetripping device 29,which is shown as a screw adjustably carried in ascrewthreaded bearing upon one of the cutterslides, engages the upperend of the lockinglever 27, throwing the same out of engagement with theshifting lever 25, which is immediately elevated through the medium ofthe spring 26', thus dropping the worm 19 out of engagement with theworm-wheel 20 and immediately stopping the feed movement of thecutter-slides.

In practice the feed-screw F will be provided at one end thereof with ahand-wheel 12, by means of which said feed-screw may be turned to bringthe cutters into working position or retract the same when the feedmechanism before described is thrown into its ineffective posit-ion.

In the form thereof herein shown the cutters O and C for forming thehub-blank are particircular in cross-section, each cutter being notchedor cut away at one side thereof, as shown at 33, to form a cutting edge34, the contourof said cutting edge coinciding with the contour ofone-half of the whee1-hub bein g form ed. It will be obvious, however,that the construction of the cutters may be varied to conform to anyrequirements. The two cutters will in practice be of such constructionand will be so set with relation to each other and with relation to therod or piece being operated upon as will enable them by theircooperation to form a complete hubblank at one continuous cuttingoperation,

one cutter acting upon and forming one half and the opposite cutteracting upon and forming the other half of said blank, said cuttersacting upon opposite sides and at opposite ends, respectively, of thehub-forming portion of the blank, as will be readily understood by acomparison of Figs. 1, 3, and 5 of the drawings.

The construction and arrangement of the cutters C and C may besubstantially the same as those of the machine described in the patentreferred to.

The cutter-carrying slides 6 and 7 will preferably be enlarged at theiradjacent inner ends, as shown most clearly in Fig. 3, each slide havingits enlarged end bored transversely to receive the stem or shank 36 ofthe cutter and being counterbored concentrically from one end, as shownin dotted lines at 37, Fig. 3, to form a bearing for the cutter-head ata point opposite the cuttingpoint of said cutter.

The shanks 36 of the cutters O and G are extended through transversebores in the cut- IIS ter-carrying slides, the ends of said shanks beingscrew-threaded and secured in place by means of nuts 38, screwed uponthe screwthreaded ends thereof and bearing against the outer faces ofsaid slides, clamping-bolts 39 being provided, which are herein shownextending vertically through the on tter-carrying slides and hearing attheir lower ends against the shoes l0, (shown in dotted lines in Fig.3,) which in turn bear upon the shanks of the cutters and preventaccidental rotation thereof. These cutters will usually be supported intheir respective slides in such manner that the inner adjacent endslthereof will lie in opposition in slightly-overlapping planes, (see Fig.1,) so that each cutter will cut a fraction more than one-half thelength of the wheel-hub blank, the cuttingfaces of the cutters beingsubstantially in alinement and cutting in opposite directions.

As a convenient means for advancing the drill-spindle carrier D anddrill-spindle K, carried thereby, the drill-spindle carrier (see Fig. 5)is furnished with a rack-bar on the lower face thereof, which is engagedby the teeth of a pinion 106, fixed to a shaft 107,

journaled in suitable hearings in a block 107, supported upon the bed B,and which shaft is provided at the outer end thereof with a gear-wheel108, which meshes with a pinion 108, journaled upon a stud 109, fixed tothe block 107, and having a hub on which is fixed a wormavheel 110, (seeFig. 4,) which meshes with a worm 112 of a worm-shaft 113, j ournaled ina bracket 111, supported for oscillatory movement upon a shaft 15, (seeFig. 2,) which in turn is journaled at opposite ends thereof in suitablebearings 117 and 117 on the block 107, and as a means for automaticallyshifting the worm 112 into and out of engagement with the worm-wheel thebracket 114: is furnished with a shifting lever 118, which is similar ina general way to the shifting lever 25, hereinbefore described inconnection with the feed mechanism for the cutter-slides (3 and 7. Thisshifting lever 118 is normally locked in an elevated position for thepurpose of maintaining an operative engagement between the worm 112 andwormwheel 110 by means, preferably, of a lockinglever 11 9, pivotallycarried at the outer end of said shifting lever and having a lock-notch120, one wall of which normally engages a catch 121, fixed to the block107, on which the drill-spindle carrier is shiftably mounted.

As a means for tripping the locking-lever 119 at a predetermined pointin the advancing movement of the drill-spindle carrier D I have provideda tripping device, which in the preferred form thereof (shown mostclearly in Figs. 2 and 3 of the drawings) comprises a tripping-pin 122,adjustably carried in a bracket 122 at the rear end of the carrier D anda reactionary tripping-rod 123, supported in bearings on the block 107and having at the inner end thereof a cam-face in position to be engagedby the inner end of the tripping-pin 122. The outer end of the rod 123is normally located in position to engage and throw the locking-lever119 out of engagement with the catch 121 when said rod is shiftedoutwardly by means of the trippingpin 122. The rod 123 is return ed toits normal position by means of the spring 124, as will be readilyunderstood by reference to Fig. 4 of the drawings. The locking-lever 119is normally retained in the locking position shown in Fig. 4 by means ofa spring 125, secured to the lower end ofthe shifting lever 118 andbearing against the lower end of the locking lever 119.

For the purpose of actuating the feed mechanism of the drill-spindlecarrier and the feed mechanism of the cutter-slides in synchronism andat predetermined relative velocities, so that the cutters O and C andthe drill will complete their respective operations at substantially thesame time, these feed mechanisms are operatively connected together,preferably by means of a train of timing or speed-regulating gears(designated in a general way by G intermediate to and connecting theshaft 15, which is the primary actuating factor for the feed mechanismof the cutter-slides, and the shaft 15, which is the primary actuatorfor the feed mechanism for the drill-spindle carrier D Owing to the factthat a right and left hand screw is provided for directly imparting afeed movement to the cutter-slides C and O and to the fact that a rackand pinion is provided for directly imparting a feed movement to thedrill-spindle carrier D it will be seen that it is necessary to providemeans intermediate the rack and pinion of the drill-spindle carrier andthe feed-screw of the cutterslides for regulating the feed movements ofthe drill-spindle and cutter-slides, and for this purpose I have shownthe shaft 15 of the cutter-feed mechanism and the shaft 15 of thedrill-feed mechanism connected together by a train of speed-reducinggears, the construction and organization of which will be such as tosecure the proper ratio of feed movement between the cutters and drill.The two feed mechanisms for the cutters and drill, respectively, and theconnection between said feed mechanisms constitute anactuating-connector between the cutter-carriers and drillcarrier, whichis effective, during the operation of the machine, for advancing andretractin g the cutters and drill in relatively intersecting planes atcomparative velocities of a predetermined ratio, and said devices may behereinafter briefly referred to as the actuating-connector between thecutter-slide and drill-spindle.

I do not desire to limit myself to the particular construction andorganization of the elements constituting the actuating-connectorbetween the cutter-slides and drill-spindle, as these may be variouslymodified without departure from this invention.

For the purpose of supporting the drill in close proximity to the piecebeing operated upon, and thereby prevent accidental fieXure of the drillduring the operation, I have provided a drill rest or hearing 180, whichis shown bolted to the cutter-slide rest B, said drill rest or bearingbeing located and sup porting the drill at a point slightly in advanceof the outer end of the piece W being operated upon.

The shaft 107, which carries the pinion 106, which meshes with the rackof the drill-spindle carrier, is shown provided with a handwheel bymeans of which the same may be turned to advance or retract said carrierby hand.

Referring to Fig. 5 of the drawings, it will be seen that the drill g isfurnished with oilgrooves 131, which extend longitudinally from theextreme end of the shank of the drill through the center of said drilland communicate with the periphery thereof near the cutting-point, andfor the purpose of supplying oil to said drill the spindle K, which isfurnished with a suitable chuck 132 at the forward end, has a centralchamber 133 of slightly-greater diameter than the diameter of thedrill-shank, and which chamber extends inward considerably beyond theend of said drill-shank, and said spindle has a series of transverseperforations near the inner end of the chamber 133, which communicatewith the interior of a reservoir 134, which surrounds this end of thespindle and is held as against longitudinal movement upon the spindlepreferably by means of a pin 135, which extends through the wall of thereservoir and has a bearing in an annular groove 136, formed in theperiphery of the spindle. In practice oil is supplied to 'the interiorof the reservoir through a conduit or feed-pipe 1.63, which leads to apumping apparatus, hereinafter described. This conduit also constitutesa means for holding the reservoir against rotative movement with thespindle.

Packing-rings 137 and 137 are interposed between the periphery of thedrill-spindle and the annular reservoir to prevent the escape of oil atthe junction of said parts.

During the operation of the machine the chamber 133 of the drill-spindleis kept constantly filled with oil from the reservoir 134, which issupplied through the conduit or feed-pipe 163, as before stated.

As a convenient means for holding the piece of work againstvibrato1*ymovement during the cutting or reducing operation I have provided, inoperative relation with the workcarrying spindle S and the cutter of thema chine,-a reactionary steady-rest (designated in a general way by Swhich in the preferred form thereof shown in Figs. 3 and 6 of thedrawings comprises two cooperative members 140 and 141, respectively,supported for longitudinal movementin relatively transverse planes insuitable bearings formed in a steady-rest carrier or bracket 142, andhaving wedge-faces 140 and 141, respectively, in

normal bearing engagement with each other. One of said members, as 140,is located with its longitudinal axis radial to the axis of thework-carrying spindle, and has a work-engaging face 143 in position toengage the periphery of the piece being operated upon, and this memberwill, for convenience, be termed the bearing member, and the othermember, which may be termed the thrust member, as 141, is located withits longitudinal axis approximately at right angles to the bearingmember 140, and the inner inclined face of said bearing member isnormally retained in engagement with the inclined face of the bearingmember by means of a spring 144, which constitutes the means formaintaining the bearing member in constant contact with the hub-blankduring the cutting operation and regulates the stress of said member.This spring is shown seated in a longitudinal recess formed in thethrust member, and the tension of said spring is regulated by aset-screw 145, against which the outer end of said spring bears, theset-screw being shown adjustably seated in a nut 146, screwed into theouter end of the thrust-member bearing.

As a means for automatically retracting the bearing member 140 on theretractive movement of the thrust member 141 a retractingspring 144 isprovided, which has a bearing at the lower end thereof in the carrier orbracket 142 and bears at its upper end against a projection 147 on theupper end of said bearing member. p

In some cases it is desirable to secure the steady-rest carrier orbracket 142 to one of the cutter-slides, as shown in Fig. 3, so as tohave a movement with said cutter-slide, and in other cases it isdesirable to fixedly secure said bracket to the frame of the machine, asshown in Figs. 6 and 7. Therefore I do not desire to limit myself to anyparticular location of the cutter-slide upon the machine, as this iswholly a matter of preference.

In Fig. 3 of the drawings, which shows the steady-rest carried by one ofthe cutter-slides, I have shown hand-operable means for retracting thethrust member to release the bearing member from engagement with thepiece being operated upon. This actuating means in the form shown insaid figure comprises a pin 148, fixed to the thrust member andextending through an elongated slot 149 in the thrust-member bearing.For the purpose of locking the thrust member in its retracted positionthe slot 149 has a lateral extension at the outer end thereof, intowhich the pin 148 may be turned when the thrust member is in its extremeretracted position, the inner wall of the laterally-deflected slotforming a catch for holding the thrust member against advancingmovement. Thisconstitutes a simple and convenient means for retractingthe thrust member by hand, and this means is also shown in connectionwith the modification illustrated in Fig. 7.

In Figs. 6 and 7 of the drawings I have shown the preferred constructionand organization of steady-rest and actuating means therefor. In thesefigures the steady-rest carrier is shown fixed to the bed of the machineand the cutter-slide is shown furnished with a thrust-member actuator150, having a cam-face 150 near the upper end thereof in position toengage the pin 148 of the thrust member 141, and which cam-face duringthe retractive movement of the slide engages said pin and graduallyretracts the thrust member, as will be readily understood by referenceto said Fig. 6.

In Figs. 6 and 7 it will be seen that the machine is furnished with onecutter-slide'in- I stead of two, as illustrated in Fig. 3 of thedrawings, and it will also be seen that this cutter-slide is furnishedat one end thereof with a turning-down cutter, which is the same as theturning-clown cutters shown in Fig. 3, and is also shown furnished atthe opposite end thereof with a tool-carrier 7 0, having a cutting-offtool '70, which is located in position to engage and cut off the blankafter the cutting-tool O has completed the turningdown operation andsaid slide has been re tracted to the position shown in dotted lines inFig. 6, theinner working end of the tool-carrier being supported in abearing, formed in one face of the steady-rest bracket.

The particular construction and organiza tion of device shown in Figs. 6and 7 of the drawings is more especially adapted for use in connectionwith ordinarylathes employed for turning and cutting off smallcylindrical articles, such as'bicyclecrank shafts and pulley-shafts andother similar articles; but it will be seen that the cutter-slide andsteadyrest and associated devices shown in Fig. 6 are readily applicableto the machine shown in Figs. 1 to 5, inclusive.

In Fig. 1 of the drawings the cutter 70 is shown pivotally supportedupon one of the cutter-slides, so that the same may be thrust backwardduring the operation of the cutters C and O and may be dropped intoposition to out off the completed blank after the cutter-slides havebeen retracted. This construction and organization of cutting device(shown in Fig. 1) is substantially the same as that described in thepatent hereinbefore referred to, to which reference may be had for amore complete description thereof.

As a convenient means for supplying oil in proper quantities to thecutters C and C and to the reservoir 134, from which oil is y conductedto the cutting end of the drill, I have provided 'a pumping apparatus,which in the preferred form thereof shown in Fig. 2 of the drawingscomprises two gear-pumps 155 and 156, located upon and driven by thesame shaft 157, which is furnished with a drivingpulley 158, driven by abelt 158 (shown in dotted lines) from any suitable source of power, (notshown,) suction-pipes 160 and 161, leading from an oil-tank 162 to thepumps 156 and 155, respectively, feed-pipes or conduits 163 and 164, theone, 163, of which leads from the pump 155 to the reservoir 134, carried on the drill-spindle K, and the other feed-pipe, 164, of whichleads from the pump 156 to a point above and between the cutters O and Crespectively, this feed-pipe being closed at its outer end and having aseries of perforations through which oil is discharged upon the piecebeing operated upon, as will be readily understood by reference to Fig.2 of the drawings.

The feed-pipes 163 and 164: are provided with cut-off valves, which aredesignated by 166 and 167, respectively, and are also furnished withoverflow-pipes, which are desig nated by 168 and 169, respectively. The

pumps 155 and 156 will preferably be of the ordinary rotating-gear typenow in common use, but it will be obvious that any form of pump may beemployed in lieu thereof.

The operation of my improved machine will be readily understood by acomparison of the several figures of the drawings by any one skilled inthe art to which this invention appertains, and therefore a detaileddescription of such operation is deemed unnecessary for the purposes ofmy present invention, it being sufficient to say that the operations ofturning down and drilling the piece are simultaneously and automaticallyeffected.

I11 forming hub-blanks on myimproved machine it is preferable to use acontinuous rod, which extends through the hollow work-carryin g spindleandis held therein by a suitable chuck in any well-known manner; but itwill be obvious that the machine is applicable for turning downhub-blanks or other analogous articles which have been previously formedto approximate size in the usual manner of forging articles of thiskind.

Having described my invention, I claim- 1. In a machine of the classspecified, the combination of a work-spindle; a rotative drill-spindle;a cutter-carrying slide supported intermediate said spindles, formovement in a plane transverse to the axis of said spindles; means forrotating the two spindles concurrently in relatively oppositedirections; and means for advancing the drill-spindle and cutter-slideconcurrently in relatively intersecting planes.

2. In a machine of the class specified, the combination with a work-spindle and with rotating mechanism therefor; of a rotative drillspindle; acutter-slide; feed mechanism cooperatively connecting the drill-spindleand cutter-slide and embodying means for simultaneously advancing andretracting the drillspindle and cutter-slide with relatively varyingvelocities of a predetermined ratio and in relatively transverse planes;and means for rotating the drill-spindle.

3. In a machine of the class specified, the combination with arotativework-spindle; of a rotative drill-spindle located in axial alinementwit-h the work -spindle; independent driving devices in connection withthe workspindle and drill-spindle and effective for rotating the twospindles in relatively opposite directions and at relatively variablevelocities; a cutter-slide supported for movement in a plane transverseto the axis of and between the work-spindle and drill-spindle and feedmechanism cooperatively connecting the drill-spindle and cutter-slideand effective for simultaneously advancing and retracting the saiddrill-spindle and cutter-slide at predetermined relative velocities. I

4. In a machine of the class specified, the combination with awork-spindle and its carrier and with a drill-spindle and its carrier;

of two oppositely-disposed cutter-slides located at opposite sides,respectively,.of the common axis of said spindles; means for rotatingthe work-spindle; and feed mechanism operatively connecting the twocutter-slides and the spindle-carrier and operable for simultaneouslyadvancing the two cutter-slides toward the axis of the drill-spindle andfor simultaneously advancing the drill-spindle at a predeterminedvelocity with relation to the velocity of feed movement of thecutter-slides.

5. In a machine of the class specified, the combination with awork-spindle and its carrier and with a drill-spindle and its carrier;of two oppositely-disposed cutter-slides located at opposite sides,respectively, of the common axis of said spindles; means for rotatingthe work-spindle and drill-spindle concurrently in opposite directionsand at predetermined relative velocities; and feed mechanism operativelyconnecting the two cutterslides and the spindle-carrier andautomatically operative for simultaneously advancing the twocutter-slides toward the axis of the drill-spindle and forsimultaneously advancing the drill-spindle carrier at a predeterminedvelocity with relation to the velocity of feed movement of thecutter-slides.

6. In a machine of the class specified, the combination with awork-spindle and a drillspindle and with independent driving mechanismin operative connection with and adapted for rotating the work-spindleand drillspindle in opposite directions at relatively varying velocitiesof a predetermined ratio; of two cutters located at opposite sides,respectively, of the axis of the drill-spindle; cutter-carrying slideson which said cutters are mounted; and feed mechanism operativelyconnecting the drill-spindle and cutter-slides and effective foradvancing the drillspindle and for simultaneously advancing thecutter-slides toward each other and in a plane intersecting the axialline of the drillspindle.

7. The combination with a suitable supporting-frame and with a rotativework-spindle,

of two tool-carriers supported one for movement in the plane of the axisof said spindle and the other for movement in a plane transversely tosaid axis; an actuating-connector between and effective for advancingand retracting the two carriers concurrently; a toolcarrying spindlerotatively mounted upon one of said carriers; and means for rotatingsaid spindle simultaneously with the advancing movement of the carrier.

8. The combination with a suitable supporting-frame and with a rotativework-spindle, of two tool-carriers supported one for movement in theplane of the axis of said spindle and the other for movement in a planetransversely of said axis; an actuating-connector between and effectivefor advancing and retractin g the two carriers concurrently andembodying a time-train for effecting a predetermined ratio of movementbetween said carriers; means in connection with each carrier andoperable for automatically stopping the advancing movement of saidcarriers at predetermined points within the range limit thereof; arotating tool carried by one of said carriers; and means for rotatingsaid tool throughout the advancing movement of said carrier.

9. The combination withasuitable supporting-frame and with a rotativework-spindle journaled in said frame, of two tool-carriers supported onefor movement in the plane of the axis of said spindle and the other formovement in a plane transversely of said axis; an actuating-connectorbetween and effective for advancing and retractingthe two carriersconcurrently; a tool-spindle rotatably mounted upon one of saidcarriers; driving mechanism for said tool-spindle, embodying adriving-shaft journaled in a fixture of the frame; a gear-wheel splinedto the drivingshaft and movable longitudinally with the tool-spindle;and a gear carried by the toolspindle and meshing with the gear on thedriving-shaft.

10. The combination with asuitable framework, of two tool-carrierssupported for advancing and retractive movements in relativelytransverse planes; drop-feed mechanism in connection with eachtool-carrier; and a speed-reducing train of gears operatively connectingthe two drop-feed mechanisms.

11. In a machine of the class specified, the combination with a suitableframework and with a rotative work-carrying spindle journaled inbearings on said framework, of two tool-carrying slides supported formovement in opposite directions and in a plane trans-- versely of thelongitudinal axis of the workspindle and having, respectively, right andleft hand feed-screw bearings; a feed-screw having right and left handthreads in engagement with the right and left hand screwthreadedbearings of the tool-carrying slides; a drill-spindle carrier supportedon the frame, for movement longitudinally thereof and having a rack; afeed-shaft journaled transversely in the framework of the machine andhaving a pinion in mesh with said rack; and

connecting driving mechanism between the rack, pinion-shaft, andfeed-screw, and embodying means for rotating the pinion-shaft upon thework carried by the spindle; and a reactionary steadyrest supported inposition to engage the work carried by the spindle.

1.3. The combination with a suitable framework, a work-carryin gspindle, and with means for rotating said spindle; of a cutterslidesupported for movement in a plane transverse to the axis of saidspindle; a steadyrest supported in operative relation with thework-carrying spindle and embodying two cooperative reciprocatorymembers, one of which has a bearing-face for engaging the work and theother of which constitutes a thrust member for normally holding thefirstmentioned member in engagement with the work; means carried by thecutter-slide, for retracting the thrust member automatically upon theretractive movement of the slide; means in connection with the bearingmemher, for retracting the same upon the retractive movement of thethrust member; and means for reciprocating the cutter-slide.

.14. The herein-described steady-rest, it comprising a suitable framehaving an gularly-disposed bearin gs whose axes are in relativelyintersecting planes; a bearing member shiftably supported in one of saidbearings and having an inclined face normally intersecting the axis ofthe other bearing; a thrust member shiftably supported in the otherhearing and having an inclined bearing-face in normal engagement withthe bearing-face of the bearing member; a spring in connection with thethrust member and effective for normally thrusting said member againstthe bearing member; means for retracting the thrust member; and meansfor retracting the bear-' of which members is actuated by the other inone direction; and means in connection with the two members, foreffecting asimultaneous retracting movement of said members.

16. In a machine of the class specified, the combination with theframework and with a rotative work-carrier; of a steady-rest supportedin operative relation with said workcarrier and comprising twocooperative spring-actuated members, one of which c011- stitutes athrust member for imparting an advancing movement to the other member;and means for retracting the thrust member.

17. In a machine of the class specified, the combination with theframework and with a rotative work-carrier; of a steady-rest supportedin operative relation with said workcarrier and comprisingashiftably-s'upported, reactionary bearing member; a thrust membersupported with its longitudinal axis in a plane intersecting the'axialplane of the bearing member, and said two members having ooactingwedge-faces; a spring in operative connection with, and effective forautomatically advancing, the thrust member; and a tension device inconnection with the thrust member, for regulating the thrust of saidmember and the bearing stress of the bearing member.

18. In a machine of the class specified, the combination with thework-spindle, the turning-down cutter, and the drill-spindle; of acompound oil-feeding apparatus comprising two independent rotary pumpsmounted upon the same shaft; means for rotating said shaft; an oil-tank;two independent suction-pipes leading from the oil-tank to the twopumps; two independent feed-pipes leading one from one pump to thedrill-spindle and the other from the other pump to a point above theturning-down cutter; and a valve and overflow-pipe in connection witheach pipe.

WVILLIAM V. TUCKER.

W'itnesses:

FRED. J. DOLE, GEO. A. HOFFMAN.

